<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <div id="main"></div>
    </el-card>
  </div>
</template>
  
<script>
import { getReportData } from 'network/report'

import * as echarts from 'echarts'
import _ from 'lodash'

export default {
  name: 'Report',
  data() {
    return {
      //需要合并的数据
      options: {
        title: {
          text: '用户来源',
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3',
            },
          },
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: 'value',
          },
        ],
      },
    }
  },
  async mounted() {
    let myChart = echarts.init(document.getElementById('main'))
    // 准备数据和配置项
    const option = await getReportData()
    if (option.meta.status !== 200)
      return this.$message.error('获取折线图失败!')

    // 合并数据
    const res = _.merge(this.options, option.data)

    // 展示数据
    myChart.setOption(res)
  },
}
</script>
<style lang="less" scoped>
#main {
  width: 600px;
  height: 400px;
}
</style>